CN110322363A - Shale gas reservoir reconstruction volume calculation method and system - Google Patents
Shale gas reservoir reconstruction volume calculation method and system Download PDFInfo
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Abstract
Disclose a kind of shale gas reservoir reconstruction volume calculation method and system.This method comprises: establishing the sample data set comprising multiple sample well sections；For the calculating parameter of target well section and multiple sample well sections, standard target well section calculating parameter value and multiple groups master sample well section calculating parameter value are obtained；The similarity for calculating target well section and each sample well section, obtains preferred sample well section；According to the calculating parameter of the calculating parameter of target well section and preferred sample well section, the final evaluation of estimate of analogy minimum value and the final evaluation of estimate of analogy maximum value are calculated, obtains analogy section；According to the transformation volume of preferred sample well section and analogy section, the transformation volume of target well section is calculated.The present invention is by compiling the well section for having been carried out micro-seismic monitoring as sample well section, while obtaining monitoring explanation results, the engineering geology calculating parameter and pressing crack construction calculating parameter for compiling sample well section, carry out more calculating parameter analogies, to evaluate effect after shale gas reservoir pressure.
Description
Technical field
The present invention relates to oil-gas field development fields, more particularly, to a kind of shale gas reservoir reconstruction volume calculation method
And system.
Background technique
In conventional oil gas reservoir and DAMAGE OF TIGHT SAND GAS RESERVOIRS, the half long and flow conductivity in single layer crack is commonly used as volume increase pressure break
Main description calculating parameter, but in shale gas reservoir these calculating parameters be not sufficient to preferably state volume increase feature.Page
After rock gas well implements fracturing reform measure, fracturing work effect need to be determined with effective method, volume is transformed in quantization signifying, then
Engineers and technicians propose transformation this calculating parameter of volume, that is, the size of the complex fracture volume generated can be approximate with one
Three-dimensional volume (transformation volume, SRV) characterization.Transformation volume is the important computations parameter increased production in FRACTURING DESIGN, can
Ginseng is calculated to analysis verifying FRACTURING DESIGN calculating parameter, feedback construction quality, inverting formation physical property calculating parameter and rock mechanics
Number, study normal fracture propagation rule and evaluation fracturing effect, improve the offers such as stimulation work effect and gas well deliverability must
The technological means wanted.Transformation volume can be measured by microseism figure, related with the Production development for being pumped into fluid volume and well.
Micro-seismic monitoring, fracturing process tracer monitoring, level are relied primarily on for the evaluation method of volume is transformed at present
Production development analytical technology after Testing Evaluation technology, horizontal well pressure after well pressure.Microseism Fracturing Monitoring technology be exactly pass through observation,
The small seismic events caused by rock rupture in fracturing process or bad break are analyzed to monitor the geophysics skill of underground state
Art, this method are the methods of generally acknowledged at present most scientific effectively evaluating transformation volume, disadvantage be it is at high cost, can not be each
All carry out monitoring on a mouthful of well.The row's of returning tracer monitoring technique is the tracer point that will be used to monitor multistage fracturing and return drain after pressure
Interval is added in the oil well for implementing multistage fracturing measure, during fracturing fluid recovery (backflow), is periodically taken to fracturing outlet liquid
Sample detected the content of a variety of tracer element complex compounds in samples taken, simultaneously according to showing for each interval detected
The content of track element complex realizes the evaluation of fracturing reform volume, and this method explanation results quantization degree is low, to transformation volume
Judgement uncertainty degree it is big.Well testing is one of the important means of Reservoir performance description and dynamic monitoring, is being based on shale gas
Flow model in porous media theoretical calculation, pass through the bottom pressure of theory and technology and actual test be fitted method determine transformation volume.
Production development analytical technology is consistent with the theoretical basis of Well Test Technology after horizontal well pressure, calculate in individual well or well group theoretical yield and
The transformation volume of shale gas reservoir is obtained in the dynamic fit procedure of actual production.The method of well testing and production capacity dynamic analysis due to
It is still immature in terms of theoretical model at present, therefore, given analysis result with practically under situation error it is larger.Cause
This, it is necessary to develop a kind of shale gas reservoir reconstruction volume calculation method and system.
The information for being disclosed in background of invention part is merely intended to deepen the reason to general background technique of the invention
Solution, and it is known to those skilled in the art existing to be not construed as recognizing or imply that the information is constituted in any form
Technology.
Summary of the invention
The invention proposes a kind of shale gas reservoir reconstruction volume calculation methods, can be had been carried out by compiling
The well section of micro-seismic monitoring compiles the engineering of sample well section while obtaining monitoring explanation results as sample well section
Geological calculation parameter and pressing crack construction calculating parameter, carry out more calculating parameter analogies, to evaluate effect after shale gas reservoir pressure.
According to an aspect of the invention, it is proposed that a kind of shale gas reservoir reconstruction volume calculation method.The method can be with
It include: to collect microseism data set, and then establish the sample data set comprising multiple sample well sections；For the calculating of target well section
The calculating parameter of parameter and the multiple sample well section, is standardized by linear transformation, obtains standard target well section
Calculating parameter value and multiple groups master sample well section calculating parameter value；Calculate each standard target well section meter of the target well section
Calculate the similarity between parameter value and master sample well section calculating parameter value corresponding in a sample well section, preferably with the mesh
The highest sample well section of well section similarity is marked, preferred sample well section is denoted as；According to the calculating parameter of the target well section with it is described
It is preferred that the calculating parameter of sample well section, calculates analogy minimum value, the analogy maximum value of each calculating parameter, and then calculate analogy
The final evaluation of estimate of minimum value and the final evaluation of estimate of analogy maximum value, obtain analogy section；According to the preferred sample well section
Transformation volume and the analogy section, calculate the transformation volume of the target well section.
Preferably, the calculating parameter includes: target layer depth, reservoir thickness, Young's modulus, Poisson's ratio, drilling mud
Density, well logging permeability, horizontally stress difference coefficient, vertical stress, long English matter content, carbonate rock content, fracture index,
Pressure break number of segment, perforation number of clusters, horizontal section length, fracture pressure, termination of pumping pressure, smooth water consumption, linear glue dosage.
Preferably, it is standardized by formula (1), obtains standard target well section calculating parameter value and multiple groups standard
Sample well section calculating parameter value:
Wherein, X' is standard target well section calculating parameter value or master sample well section calculating parameter value, and minA and maxA divide
Not Wei the calculating parameter minimum value and maximum value, X be the calculating parameter original value.
Preferably, it calculates in each standard target well section calculating parameter value and a sample well section of the target well section
Similarity between corresponding master sample well section calculating parameter value include: according to the calculating parameter establish sample well section YB and
The similar finite element set of target well section MB；According to the similar finite element set, calculate similar in sample well section YB and target well section MB
First characteristic value；According to the similar finite element characteristic value, feature similarity degree, each standard mesh of the as described target well section are calculated
Mark the similarity between well section calculating parameter value and master sample well section calculating parameter value corresponding in the sample well section.
Preferably, the similar finite element set of the sample well section YB and target well section MB are as follows:
U=[ui] (2)
Wherein, U is similar finite element set, uiFor similar finite element, ui={ YBi,MBi, i expression calculating parameter serial number, i=1,
2 ..., 18.
Preferably, i-th of similar finite element characteristic value in sample well section YB and target well section MB are as follows:
Wherein, RiFor i-th of similar finite element characteristic value.
Preferably, the feature similarity degree of sample well section YB and target well section MB are as follows:
Wherein, Q is characterized similarity degree, and n is sample well section serial number.
Preferably, the analogy minimum value are as follows:
Analogy minimum value=min (target well section calculating parameter, preferably template well section calculating parameter)/max (target well section meter
Calculate parameter, preferably template well section calculating parameter) (5)；
The analogy maximum value are as follows:
Analogy minimum value=max (target well section calculating parameter, preferably template well section calculating parameter)/min (target well section meter
Calculate parameter, preferably template well section calculating parameter) (6).
According to another aspect of the invention, it is proposed that a kind of shale gas reservoir reconstruction volume computing system, may include: to receive
Collect unit, for collecting microseism data set, and then establishes the sample data set comprising multiple sample well sections；Linear transformation list
Member is marked for the calculating parameter of calculating parameter and the multiple sample well section for target well section by linear transformation
Quasi-ization processing, obtains standard target well section calculating parameter value and multiple groups master sample well section calculating parameter value；Similarity unit is used
In calculating each standard target well section calculating parameter value of the target well section and corresponding standard sample in a sample well section
Similarity between this well section calculating parameter value is denoted as preferably preferably with the highest sample well section of the target well section similarity
Sample well section；Analogy unit, for the calculating parameter according to the calculating parameter of the target well section and the preferred sample well section,
Analogy minimum value, the analogy maximum value of each calculating parameter are calculated, and then calculates the final evaluation of estimate and class of analogy minimum value
Than the final evaluation of estimate of maximum value, analogy section is obtained；Computing unit, for the transformation volume according to the preferred sample well section
With the analogy section, the transformation volume of the target well section is calculated.
Preferably, the calculating parameter includes: target layer depth, reservoir thickness, Young's modulus, Poisson's ratio, drilling mud
Density, well logging permeability, horizontally stress difference coefficient, vertical stress, long English matter content, carbonate rock content, fracture index,
Pressure break number of segment, perforation number of clusters, horizontal section length, fracture pressure, termination of pumping pressure, smooth water consumption, linear glue dosage.
Preferably, it is standardized by formula (1), obtains standard target well section calculating parameter value and multiple groups standard
Sample well section calculating parameter value:
Wherein, X' is standard target well section calculating parameter value or master sample well section calculating parameter value, and minA and maxA divide
Not Wei the calculating parameter minimum value and maximum value, X be the calculating parameter original value.
Preferably, it calculates in each standard target well section calculating parameter value and a sample well section of the target well section
Similarity between corresponding master sample well section calculating parameter value include: according to the calculating parameter establish sample well section YB and
The similar finite element set of target well section MB；According to the similar finite element set, calculate similar in sample well section YB and target well section MB
First characteristic value；According to the similar finite element characteristic value, feature similarity degree, each standard mesh of the as described target well section are calculated
Mark the similarity between well section calculating parameter value and master sample well section calculating parameter value corresponding in the sample well section.
Preferably, the similar finite element set of the sample well section YB and target well section MB are as follows:
U=[ui] (2)
Wherein, U is similar finite element set, uiFor similar finite element, ui={ YBi,MBi, i expression calculating parameter serial number, i=1,
2 ..., 18.
Preferably, i-th of similar finite element characteristic value in sample well section YB and target well section MB are as follows:
Wherein, RiFor i-th of similar finite element characteristic value.
Preferably, the feature similarity degree of sample well section YB and target well section MB are as follows:
Wherein, Q is characterized similarity degree, and n is sample well section serial number.
Preferably, the analogy minimum value are as follows:
Analogy minimum value=min (target well section calculating parameter, preferably template well section calculating parameter)/max (target well section meter
Calculate parameter, preferably template well section calculating parameter) (5)；
The analogy maximum value are as follows:
Analogy minimum value=max (target well section calculating parameter, preferably template well section calculating parameter)/min (target well section meter
Calculate parameter, preferably template well section calculating parameter) (6).
The present invention has other characteristics and advantages, these characteristics and advantages are from the attached drawing and subsequent tool being incorporated herein
It will be apparent, or will be carried out in body embodiment in the drawings and the subsequent detailed description incorporated herein
Statement in detail, the drawings and the detailed description together serve to explain specific principles of the invention.
Detailed description of the invention
Exemplary embodiment of the present is described in more detail in conjunction with the accompanying drawings, of the invention is above-mentioned and other
Purpose, feature and advantage will be apparent, wherein in exemplary embodiments of the present invention, identical reference label is usual
Represent same parts.
Fig. 1 shows the flow chart of the step of shale gas reservoir reconstruction volume calculation method according to the present invention.
Specific embodiment
The present invention will be described in more detail below with reference to accompanying drawings.Although showing the preferred embodiment of the present invention in attached drawing,
However, it is to be appreciated that may be realized in various forms the present invention and should not be limited by the embodiments set forth herein.On the contrary, providing
These embodiments are of the invention more thorough and complete in order to make, and can will fully convey the scope of the invention to ability
The technical staff in domain.
Fig. 1 shows the flow chart of the step of shale gas reservoir reconstruction volume calculation method according to the present invention.
In this embodiment, shale gas reservoir reconstruction volume calculation method according to the present invention may include: step 101,
Microseism data set is collected, and then establishes the sample data set comprising multiple sample well sections；Step 102, for target well section
The calculating parameter of calculating parameter and multiple sample well sections, is standardized by linear transformation, obtains standard target well section
Calculating parameter value and multiple groups master sample well section calculating parameter value；Step 103, each standard target well of target well section is calculated
Section calculating parameter value and master sample well section calculating parameter value corresponding in a sample well section between similarity, preferably with mesh
The highest sample well section of well section similarity is marked, preferred sample well section is denoted as；Step 104, according to the calculating parameter of target well section with
It is preferred that the calculating parameter of sample well section, calculates analogy minimum value, the analogy maximum value of each calculating parameter, and then calculate analogy
The final evaluation of estimate of minimum value and the final evaluation of estimate of analogy maximum value, obtain analogy section；Step 105, according to preferred sample
The transformation volume of well section and analogy section calculate the transformation volume of target well section.
In one example, calculating parameter includes: target layer depth, reservoir thickness, Young's modulus, Poisson's ratio, drilling well mud
Pulp density, well logging permeability, horizontally stress difference coefficient, vertical stress, long English matter content, carbonate rock content, crack refer to
Number, pressure break number of segment, perforation number of clusters, horizontal section length, fracture pressure, termination of pumping pressure, smooth water consumption, linear glue dosage.
In one example, it is standardized by formula (1), obtains standard target well section calculating parameter value and more
Group master sample well section calculating parameter value:
Wherein, X' is standard target well section calculating parameter value or master sample well section calculating parameter value, and minA and maxA divide
Not Wei the calculating parameter minimum value and maximum value, X be the calculating parameter original value.
In one example, each standard target well section calculating parameter value and a sample well section of target well section are calculated
In similarity between corresponding master sample well section calculating parameter value include: that sample well section YB and mesh are established according to calculating parameter
Mark the similar finite element set of well section MB；According to similar finite element set, the similar finite element feature in sample well section YB and target well section MB is calculated
Value；According to similar finite element characteristic value, feature similarity degree, as each standard target well section calculating parameter of target well section are calculated
It is worth and the similarity between master sample well section calculating parameter value corresponding in the sample well section.
In one example, the similar finite element set of sample well section YB and target well section MB are as follows:
U=[ui] (2)
Wherein, U is similar finite element set, uiFor similar finite element, ui={ YBi,MBi, i expression calculating parameter serial number, i=1,
2 ..., 18.
In one example, i-th of similar finite element characteristic value in sample well section YB and target well section MB are as follows:
Wherein, RiFor i-th of similar finite element characteristic value.
In one example, the feature similarity degree of sample well section YB and target well section MB are as follows:
Wherein, Q is characterized similarity degree, and n is sample well section serial number.
In one example, analogy minimum value are as follows:
Analogy minimum value=min (target well section calculating parameter, preferably template well section calculating parameter)/max (target well section meter
Calculate parameter, preferably template well section calculating parameter) (5)；
Analogy maximum value are as follows:
Analogy minimum value=max (target well section calculating parameter, preferably template well section calculating parameter)/min (target well section meter
Calculate parameter, preferably template well section calculating parameter) (6).
Specifically, shale gas reservoir reconstruction volume calculation method according to the present invention may include: to collect microseism data
Collection, and then establish the sample data set comprising multiple sample well sections；Calculating parameter and multiple sample well sections for target well section
Calculating parameter, be standardized by linear transformation, obtain standard target well section calculating parameter value and multiple groups standard sample
This well section calculating parameter value, wherein calculating parameter includes engineering geology calculating parameter and pressing crack construction calculating parameter, wherein work
Journey geological calculation parameter includes target layer depth, reservoir thickness, Young's modulus, Poisson's ratio, wellbore mud density, well logging infiltration
Rate, horizontally stress difference coefficient, vertical stress, long English matter content, carbonate rock content, fracture index, pressing crack construction calculate
Parameter includes pressure break number of segment, perforation number of clusters, horizontal section length, fracture pressure, termination of pumping pressure, smooth water consumption, linear glue use
Amount, and then be standardized according to above-mentioned calculating parameter by formula (1), obtain standard target well section calculating parameter value with
Multiple groups master sample well section calculating parameter value, wherein minA and maxA is respectively that sample data concentrates each well section and target well section
In the calculating parameter minimum value and maximum value.
According to science of similarity theory, similarity quantitative approach analogy well section is used to the calculating parameter after normalized
Calculating parameter evaluation of estimate: calculate target well section each standard target well section calculating parameter value with it is right in a sample well section
The similarity between master sample well section calculating parameter value answered, establishes sample well section YB and target well section MB according to calculating parameter
Similar finite element collection be combined into formula (2)；According to similar finite element set, the similar finite element feature in sample well section YB and target well section MB is calculated
Value, wherein i-th of similar finite element characteristic value is formula (3)；According to similar finite element characteristic value, calculating feature similarity degree is formula
(4), the as similarity of target well section and the sample well section, and then it is similar to each sample well section to calculate target well section
Degree, acquisition and the highest sample well section of target well section similarity, are denoted as preferred sample well section.According to the calculating parameter of target well section
With the calculating parameter of preferred sample well section, the analogy minimum value for calculating each calculating parameter according to formula (5), (6), analogy are most
Big value, and then the final evaluation of estimate of analogy minimum value and the final evaluation of estimate of analogy maximum value are calculated, and then obtain analogy section,
The process can also consider the influence of key factor, carry out in the otherness of calculating parameter collection according to the professional recognition of expert
The adjustment of Weight of Expert calculates analogy section using weighted average algorithm；By the transformation volume and analogy of preferred sample well section
Section is multiplied, and calculates the transformation volume of target well section.
The present invention, which passes through, compiles the well section for having been carried out micro-seismic monitoring as sample well section, explains obtaining monitoring
As a result while, the engineering geology calculating parameter and pressing crack construction calculating parameter of sample well section are compiled, calculate is carried out more and joins
Several classes of ratios, to evaluate effect after shale gas reservoir pressure.
Using example
A concrete application example is given below in the scheme and its effect of the embodiment of the present invention for ease of understanding.This field
It should be understood to the one skilled in the art that the example is only for the purposes of understanding the present invention, any detail is not intended to be limited in any way
The system present invention.
Collect the 5 mouthfuls of well engineering geology calculating parameters and pressing crack construction calculating parameter of certain shale gas development block, these samples
The micro-seismic monitoring that this well is implemented in fracturing process, collected engineering geology calculating parameter and pressing crack construction calculating parameter
Respectively as shown in table 1 and table 2:
Table 1
| Calculating parameter | XX-1 well | XX-2 well | XX-3 well | XX-4 well | XX-5 well |
| Target layer depth/m | 2832 | 2633 | 2646 | 2678 | 2889 |
| Reservoir thickness/m | 9.5 | 14 | 14.5 | 6 | 10 |
| Young's modulus/GPa | 35.5 | 32.1 | 34.6 | 31.3 | 33.8 |
| Poisson's ratio | 0.18 | 0.19 | 0.21 | 0.17 | 0.18 |
| Wellbore mud density/g/cm3 | 1.46 | 1.42 | 1.36 | 1.25 | 1.36 |
| Log well permeability/mD | 0.10 | 0.16 | 0.18 | 0.01 | 0.20 |
| Horizontal stress coefficient of variation | 0.09 | 0.11 | 0.06 | 0.10 | 0.13 |
| Vertical stress/MPa | 50.1667 | 53.6767 | 49.2467 | 51.7367 | 50.1667 |
| Long English matter content/% | 51.85 | 50.79 | 61.75 | 60.67 | 61.18 |
| Carbonate rock content/% | 1.95 | 18.31 | 9.48 | 10.83 | 11.13 |
| Fracture index | 0.41 | 0.46 | 0.40 | 0.49 | 0.44 |
Table 2
| Calculating parameter | XX-1 well | XX-2 well | XX-3 well | XX-4 well | XX-5 well |
| Pressure break number of segment/section | 15 | 21 | 22 | 14 | 18 |
| Perforation number of clusters/cluster | 43 | 56 | 59 | 39 | 53 |
| Horizontal section length/m | 1406.5 | 1474 | 1462 | 1357.5 | 1511 |
| Fracture pressure/MPa | 51.45 | 68.49 | 62.49 | 79.11 | 57.25 |
| Termination of pumping pressure/MPa | 31.03 | 37.26 | 30.58 | 34.74 | 28.73 |
| Smooth water consumption/m3 | 21398.79 | 30369 | 32733.4 | 19821.5 | 28927.7 |
| Linear glue dosage/m3 | 6054.84 | 7916 | 6113.2 | 4028.9 | 3544.03 |
The transformation volume of each well is as shown in table 3:
Table 3
| Calculating parameter | XX-1 well | XX-2 well | XX-3 well | XX-4 well | XX-5 well |
| Volume/m is transformed3 | 53131060 | 32742413 | 26399738 | 19853456 | 25984331 |
The geological calculation parameter and pressing crack construction calculating parameter of the quasi- target well section for calculating transformation volume are as follows: target layer depth
2889m, reservoir thickness 0.2m, Young's modulus 33.5GPa, 0.19 dimensionless of Poisson's ratio are spent, wellbore mud density 1.40gcm3 is surveyed
Well permeability 0.17mD, horizontal stress coefficient of variation 0.12, vertical stress 49.67MPa, long English matter content 56.85%, carbonate
Rock content 4.95%, 0.35 dimensionless of fracture index, 17 sections of pressure break number of segment, 46 cluster of perforation number of clusters, horizontal section length
1489.5m, fracture pressure 45.45MPa, termination of pumping pressure 35.03MPa, smooth water consumption 2308.79m3, linear glue dosage
7623.09m3。
Linear transformation is carried out to sample calculating parameter collection using well standardized method.Standard target well section calculating parameter value with
Multiple groups master sample well section calculating parameter value is as shown in table 4:
Table 4
| Calculating parameter | XX-1 well | XX-2 well | XX-3 well | XX-4 well | XX-5 well |
| Target layer depth/m | 0.777 | 0.000 | 0.051 | 0.051 | 1.000 |
| Reservoir thickness/m | 0.412 | 0.941 | 1.000 | 1.000 | 0.471 |
| Young's modulus/GPa | 1.000 | 0.190 | 0.786 | 0.786 | 0.595 |
| Poisson's ratio/dimensionless | 0.250 | 0.500 | 1.000 | 1.000 | 0.250 |
| Wellbore mud density/g/cm3 | 1.000 | 0.810 | 0.524 | 0.524 | 0.524 |
| Log well permeability/mD | 0.474 | 0.789 | 0.895 | 0.895 | 1.000 |
| Horizontal stress coefficient of variation | 0.429 | 0.714 | 0.000 | 0.000 | 1.000 |
| Vertical stress/MPa | 0.208 | 1.000 | 0.000 | 0.000 | 0.208 |
| Long English matter content/% | 0.097 | 0.000 | 1.000 | 1.000 | 0.948 |
| Carbonate rock content/% | 0.000 | 1.000 | 0.460 | 0.460 | 0.561 |
| Fracture index/dimensionless | 0.111 | 0.667 | 0.000 | 0.000 | 0.444 |
| Pressure break number of segment/section | 0.125 | 0.875 | 1.000 | 1.000 | 0.500 |
| Perforation number of clusters/cluster | 0.200 | 0.850 | 1.000 | 1.000 | 0.700 |
| Horizontal section length/m | 0.319 | 0.759 | 0.681 | 0.681 | 1.000 |
| Fracture pressure/MPa | 0.000 | 0.616 | 0.399 | 0.399 | 0.210 |
| Termination of pumping pressure/MPa | 0.270 | 1.000 | 0.217 | 0.217 | 0.000 |
| Smooth water consumption/m3 | 0.122 | 0.817 | 1.000 | 1.000 | 0.705 |
| Linear glue dosage/m3 | 0.574 | 1.000 | 0.588 | 0.588 | 0.000 |
According to science of similarity theory, the similarity of target well section and each sample well section, obtained similarity are calculated
As a result are as follows: XX-1 well: 0.91, XX-2 well: 0.78, XX-3 well: 0.87, XX-4 well: 0.72, XX-5 well: 0.83.
It is ranked up according to similarity calculation result are as follows:
XX-1 well > XX-3 well > XX-5 well > XX-2 well > XX-4 well.
It is therefore preferable that XX-1 well connects with target well section in engineering geology calculating parameter and pressing crack construction calculating parameter the most out
Close sample well, note XX-1 well are preferred sample well section.
According to the calculating parameter of the calculating parameter of target well section and preferred sample well section, the class of each calculating parameter is calculated
Than minimum value, analogy maximum value, and then the final evaluation of estimate of analogy minimum value and the final evaluation of estimate of analogy maximum value are calculated, such as
Shown in table 5, and then obtaining analogy section is 0.89-1.12.
Table 5
It is 5.3 × 10 according to the Crack Monitoring result of the sample well XX-1 preferably gone out7m3, so the variant of target well section
Product is 4.71-5.93 × 107m3Between.
In conclusion the present invention is being obtained by compiling the well section for having been carried out micro-seismic monitoring as sample well section
While taking monitoring explanation results, the engineering geology calculating parameter and pressing crack construction calculating parameter of sample well section are compiled, into
The more calculating parameter analogies of row, to evaluate effect after shale gas reservoir pressure.
A kind of shale gas reservoir reconstruction volume computing system is proposed according to the present invention, be may include: collector unit, is used for
Microseism data set is collected, and then establishes the sample data set comprising multiple sample well sections；Linear transform unit, for being directed to mesh
The calculating parameter of well section and the calculating parameter of multiple sample well sections are marked, is standardized by linear transformation, standard is obtained
Target well section calculating parameter value and multiple groups master sample well section calculating parameter value；Similarity unit, for calculating target well section
Between each standard target well section calculating parameter value and master sample well section calculating parameter value corresponding in a sample well section
Similarity be denoted as preferred sample well section preferably with the highest sample well section of target well section similarity；Analogy unit is used for root
According to target well section calculating parameter and preferred sample well section calculating parameter, calculate each calculating parameter analogy minimum value,
Analogy maximum value, and then the final evaluation of estimate of analogy minimum value and the final evaluation of estimate of analogy maximum value are calculated, obtain analogy area
Between；Computing unit, for calculating the transformation volume of target well section according to the transformation volume of preferred sample well section and analogy section.
In one example, calculating parameter includes: target layer depth, reservoir thickness, Young's modulus, Poisson's ratio, drilling well mud
Pulp density, well logging permeability, horizontally stress difference coefficient, vertical stress, long English matter content, carbonate rock content, crack refer to
Number, pressure break number of segment, perforation number of clusters, horizontal section length, fracture pressure, termination of pumping pressure, smooth water consumption, linear glue dosage.
In one example, it is standardized by formula (1), obtains standard target well section calculating parameter value and more
Group master sample well section calculating parameter value:
Wherein, X' is standard target well section calculating parameter value or master sample well section calculating parameter value, and minA and maxA divide
Not Wei the calculating parameter minimum value and maximum value, X be the calculating parameter original value.
In one example, each standard target well section calculating parameter value and a sample well section of target well section are calculated
In similarity between corresponding master sample well section calculating parameter value include: that sample well section YB and mesh are established according to calculating parameter
Mark the similar finite element set of well section MB；According to similar finite element set, the similar finite element feature in sample well section YB and target well section MB is calculated
Value；According to similar finite element characteristic value, feature similarity degree, as each standard target well section calculating parameter of target well section are calculated
It is worth and the similarity between master sample well section calculating parameter value corresponding in the sample well section.
In one example, the similar finite element set of sample well section YB and target well section MB are as follows:
U=[ui] (2)
Wherein, U is similar finite element set, uiFor similar finite element, ui={ YBi,MBi, i expression calculating parameter serial number, i=1,
2 ..., 18.
In one example, i-th of similar finite element characteristic value in sample well section YB and target well section MB are as follows:
Wherein, RiFor i-th of similar finite element characteristic value.
In one example, the feature similarity degree of sample well section YB and target well section MB are as follows:
Wherein, Q is characterized similarity degree, and n is sample well section serial number.
In one example, analogy minimum value are as follows:
Analogy minimum value=min (target well section calculating parameter, preferably template well section calculating parameter)/max (target well section meter
Calculate parameter, preferably template well section calculating parameter) (5)；
Analogy maximum value are as follows:
Analogy minimum value=max (target well section calculating parameter, preferably template well section calculating parameter)/min (target well section meter
Calculate parameter, preferably template well section calculating parameter) (6).
This system, which passes through, compiles the well section for having been carried out micro-seismic monitoring as sample well section, explains obtaining monitoring
As a result while, the engineering geology calculating parameter and pressing crack construction calculating parameter of sample well section are compiled, calculate is carried out more and joins
Several classes of ratios, to evaluate effect after shale gas reservoir pressure.
It will be understood by those skilled in the art that above to the purpose of the description of the embodiment of the present invention only for illustratively saying
The beneficial effect of bright the embodiment of the present invention is not intended to limit embodiments of the invention to given any example.
Various embodiments of the present invention are described above, above description is exemplary, and non-exclusive, and
It is not limited to disclosed each embodiment.Without departing from the scope and spirit of illustrated each embodiment, for this skill
Many modifications and changes are obvious for the those of ordinary skill in art field.
Claims (10)
1. a kind of shale gas reservoir reconstruction volume calculation method, comprising:
Microseism data set is collected, and then establishes the sample data set comprising multiple sample well sections；
The calculating parameter of calculating parameter and the multiple sample well section for target well section, is standardized by linear transformation
Processing obtains standard target well section calculating parameter value and multiple groups master sample well section calculating parameter value；
Calculate each standard target well section calculating parameter value of the target well section and corresponding standard in a sample well section
Similarity between sample well section calculating parameter value is denoted as excellent preferably with the highest sample well section of the target well section similarity
This well section of sampling；
According to the calculating parameter of the calculating parameter of the target well section and the preferred sample well section, each calculating parameter is calculated
Analogy minimum value, analogy maximum value, and then calculate analogy minimum value final evaluation of estimate and analogy maximum value final evaluation
Value obtains analogy section；
According to the transformation volume of the preferred sample well section and the analogy section, the transformation volume of the target well section is calculated.
2. shale gas reservoir reconstruction volume calculation method according to claim 1, wherein the calculating parameter includes: mesh
Mark layer depth, reservoir thickness, Young's modulus, Poisson's ratio, wellbore mud density, well logging permeability, horizontally stress difference coefficient,
Vertical stress, long English matter content, carbonate rock content, fracture index, pressure break number of segment, perforation number of clusters, horizontal section length, rupture
Pressure, termination of pumping pressure, smooth water consumption, linear glue dosage.
3. shale gas reservoir reconstruction volume calculation method according to claim 2, wherein carry out standard by formula (1)
Change processing, obtains standard target well section calculating parameter value and multiple groups master sample well section calculating parameter value:
Wherein, X' is standard target well section calculating parameter value or master sample well section calculating parameter value, and minA and maxA are respectively
The minimum value and maximum value of the calculating parameter, X are the original value of the calculating parameter.
4. shale gas reservoir reconstruction volume calculation method according to claim 3, wherein calculate the every of the target well section
Between one standard target well section calculating parameter value and master sample well section calculating parameter value corresponding in a sample well section
Similarity includes:
The similar finite element set of sample well section YB and target well section MB are established according to the calculating parameter；
According to the similar finite element set, the similar finite element characteristic value in sample well section YB and target well section MB is calculated；
According to the similar finite element characteristic value, feature similarity degree, each standard target well of the as described target well section are calculated
Similarity between section calculating parameter value and master sample well section calculating parameter value corresponding in the sample well section.
5. shale gas reservoir reconstruction volume calculation method according to claim 4, wherein the sample well section YB and target
The similar finite element set of well section MB are as follows:
U=[ui] (2)
Wherein, U is similar finite element set, uiFor similar finite element, ui={ YBi,MBi, i expression calculating parameter serial number, i=1,2 ..., 18.
6. shale gas reservoir reconstruction volume calculation method according to claim 5, wherein sample well section YB and target well section
I-th of similar finite element characteristic value in MB are as follows:
Wherein, RiFor i-th of similar finite element characteristic value.
7. shale gas reservoir reconstruction volume calculation method according to claim 6, wherein sample well section YB and target well section
The feature similarity degree of MB are as follows:
Wherein, Q is characterized similarity degree, and n is sample well section serial number.
8. shale gas reservoir reconstruction volume calculation method according to claim 1, wherein the analogy minimum value are as follows:
(target well section calculates ginseng to analogy minimum value=min (target well section calculating parameter, preferably template well section calculating parameter)/max
Number, preferably template well section calculating parameter) (5)；
The analogy maximum value are as follows:
(target well section calculates ginseng to analogy minimum value=max (target well section calculating parameter, preferably template well section calculating parameter)/min
Number, preferably template well section calculating parameter) (6).
9. a kind of shale gas reservoir reconstruction volume computing system, comprising:
Collector unit for collecting microseism data set, and then establishes the sample data set comprising multiple sample well sections；
Linear transform unit passes through for the calculating parameter of calculating parameter and the multiple sample well section for target well section
Linear transformation is standardized, and obtains standard target well section calculating parameter value and multiple groups master sample well section calculating parameter
Value；
Similarity unit, for calculating each standard target well section calculating parameter value and a sample well of the target well section
Similarity in section between corresponding master sample well section calculating parameter value, preferably with the highest sample of target well section similarity
This well section is denoted as preferred sample well section；
Analogy unit, for calculating according to the calculating parameter of the target well section and the calculating parameter of the preferred sample well section
Analogy minimum value, the analogy maximum value of each calculating parameter, and then the final evaluation of estimate for calculating analogy minimum value and analogy are most
The final evaluation of estimate being worth greatly obtains analogy section；
Computing unit, for calculating the target well according to the transformation volume of the preferred sample well section and the analogy section
The transformation volume of section.
10. shale gas reservoir reconstruction volume computing system according to claim 9, wherein the calculating parameter includes: mesh
Mark layer depth, reservoir thickness, Young's modulus, Poisson's ratio, wellbore mud density, well logging permeability, horizontally stress difference coefficient,
Vertical stress, long English matter content, carbonate rock content, fracture index, pressure break number of segment, perforation number of clusters, horizontal section length, rupture
Pressure, termination of pumping pressure, smooth water consumption, linear glue dosage.
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